DAVID MUIR: Good evening and we begin tonight with this new warning, with just 13 days to the election. The retired four-star Marine general, who was former President Donald Trump's longest serving Chief of Staff, retired General John Kelly, warning that if Trump is elected again he would rule like a dictator, and Kelly describing in detail what Trump said about Hitler on a number of occasions. You will hear the audio of General Kelly right here tonight. Vice President Kamala Harris coming before the cameras this afternoon, calling Trump's alleged comments about Hitler, quote, “deeply troubling and incredibly dangerous.” As a retired four-star general, General Kelly does not make political endorsements, but he says he felt compelled to speak out after Trump repeatedly threatened to use the American military against the quote, “enemy within”, Americans in this country. At a town hall in Georgia, Donald Trump made no mention of Kelly's comments today but tonight, Donald Trump posting just moments ago that the general is a low life who made up a story. Tonight, General John Kelly in his interview with The New York Times signaling voters should consider fitness and character when voting for president this year. We have both campaigns covered, Mary Bruce leading us off with the vice president in Pennsylvania tonight.